NRE 3GS21B

NRE 3GS21B

A new NRE 3GS21B locomotive in the Union Pacific scheme.

Type and origin Power type Diesel-electric Builder National Railway Equipment (NREC) Model 3GS21B Build date December 2006 (2006-12) – Present Total produced 182

Specifications Gauge 4 ft 8 1⁄2 in (1,435 mm) Prime mover Cummins QSK19C (×3) Engine type Diesel engine Aspiration Turbocharger Cylinders 6 (×3)

Performance figures Power output 2,100 hp (1,570 kW)

Career Operators See list

External images

RailPictures.Net – NRE 3GS21B photographs from RailPictures.Net.

Railroad Picture Archives – Photographs of the NRE 3GS21B at Railroad Picture Archives.

The 3GS21B is a low-emissions diesel switcher locomotive built by National Railway Equipment. It is powered by three Cummins QSK19C I6 engines with each one developing 700 horsepower (522 kW) and creating a total power output of 2,100 horsepower (1,570 kW). Having multiple engines instead of a single prime mover, a design referred to as a "Genset," reduces overall diesel emissions and improves fuel efficiency. More than 150 of the 3GS21B Genset locomotives have been produced to date, with the majority of these units being manufactured at NREC's Mount Vernon shops in Southern Illinois. In addition, three road slug models have also been produced.

The NRE 2GS14B is a low-emissions diesel switcher locomotive built by National Railway Equipment. It is powered by two Cummins QSK19C I6 engines with each one developing 700 horsepower (522 kW) and creating a total power output of 1,400 horsepower (1,040 kW). At least 7 2GS14B genset locomotives have been produced to date, with the majority of these units being manufactured at NREC's Mount Vernon shops in Southern Illinois.